public static void WriteBinaryToFile(string filename, string binaryText)
{
FileStream fs = new FileStream("C:\\" + filename, FileMode.Create);
StringBuilder sub_text = new StringBuilder(800);
byte[] bytes = new byte[100];
int length = 800;
for (int i = 0; i <= binaryText.Length / 800; i++)
{
int remain = binaryText.Length - i * 800;
if (remain < 800)
{
length = remain;
}
sub_text.Remove(0, sub_text.Length);
sub_text.Append(binaryText.Substring(i * 800, length));
for (int j = 0; j < sub_text.Length / 8; j++)
{
bytes[j] = ProcessDES.FromBinaryToByte(sub_text.ToString().Substring(j * 8, 8));
}
fs.Write(bytes, 0, sub_text.Length / 8);
}
fs.Close();
}
public static string FileReadToBinary(string filename)
{
FileStream fs = new FileStream("C:\\" + filename, FileMode.Open);
Console.WriteLine("File size : " + fs.Length);
int fileLength = (int)fs.Length;
StringBuilder text = new StringBuilder((int)fs.Length * 8);
byte[] bytes = new byte[100];
int startindex = 0;
int IsEnd = -1;
while (fs.Read(bytes, startindex, bytes.Length) != 0)
{
if (IsEnd > 0)
{
}
foreach (byte b in bytes)
{
if (text.Length == fileLength * 8)
{
break;
}
text.Append(ProcessDES.FromDeciamlToBinary(b));
}
}
fs.Close();
return(text.ToString());
}
public string DoPermutation(string text, int[,] order)
{
string PermutatedText = "";
int rowIndex = Convert.ToInt32(text[0].ToString() + text[text.Length - 1].ToString(), 2);
int colIndex = Convert.ToInt32(text.Substring(1, 4), 2);
PermutatedText = ProcessDES.FromDeciamlToBinary(order[rowIndex, colIndex]);
return(PermutatedText);
}
